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STATE DF C,�)_!r,7RNIA PETE WILSON, Governor CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— CENTRAL VALLEY REGION 3443 ROUTIER ROAD, SUITE A SACRAMENTO, CA 95827-3098 PHONE: (916) 361-5600 [E 0 W FAX: (916) 361-5686 15 March 1991 U V L7- Aft Mr. Michael McCluskey Director of Public Works City of Tracy 520 West Tracy Boulevard Tracy, CA 95376 RANK 6 SOLID WASTE ASSESSMENT TEST FOR CITY OF TRACY LANDFILL Operators of active and inactive solid waste disposal sites are required by State law to perform a Solid Waste Water Quality Assessment Test (SWAT). The purpose of the SWAT is to determine if hazardous waste is leaching into surface or ground water on, under, and within one mile of the disposal site. The State Water Resources Control Board has ranked all solid waste disposal sites within the State. This ranking is used to determine when each landfill owner/operator is required to do a SWAT. Each rank contains 150 sites. The due date for your SWAT is dependent on your site's ranking. The City is listed in Rank 6. This means that the City is required to perform a SWAT on this site during the period 1 July 1991 to 30 June 1992. The SWAT Investigation consists of two phases. The first phase involves the preparation of SWAT Proposal. After Regional Board review and approval of the SWAT Proposal , the SWAT Investigation is completed and a final report sent to the Regional Board. Guidance for preparing both a SWAT Proposal and SWAT Report, along with a copy of Water Code Section 13273, are enclosed with this letter. Normally a SWAT Proposal would be requested for your site prior to 1 June 1991. However, State funding will likely not be available for the Regional Board to review SWAT proposals for Rank 6 sites during the next State Fiscal Year, which runs from 1 July 1991 - 30 June 1992. Therefore, we are not requesting that you submit a SWAT Proposal at this time. Should funding become available for this work at the Regional Board, we will notify you. We suggest that you consider the requirements for Water Code Section 13273 and decide whether you wish to proceed or plan to do a SWAT. Under certain circumstances, the disposal site operator/owner may request a waiver of the SWAT requirement if ongoing monitoring information can conclu- sively demonstrate that hazardous wastes are migrating from the site into waters of the State. The waiver request should be made to the Regional Board and accompanied by supporting information that describes the leaking hazardous substance(s).